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<div id="overview"><a href="../../../../../apidocs/com/totsp/gwittir/service/StreamServiceServlet.html">View Javadoc</a></div><pre>

<a name="1" href="#1">1</a>   <em class="jxr_comment">/*</em>
<a name="2" href="#2">2</a>   <em class="jxr_comment"> * To change this template, choose Tools | Templates</em>
<a name="3" href="#3">3</a>   <em class="jxr_comment"> * and open the template in the editor.</em>
<a name="4" href="#4">4</a>   <em class="jxr_comment"> */</em>
<a name="5" href="#5">5</a>   <strong class="jxr_keyword">package</strong> com.totsp.gwittir.service;
<a name="6" href="#6">6</a>   
<a name="7" href="#7">7</a>   <strong class="jxr_keyword">import</strong> com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException;
<a name="8" href="#8">8</a>   <strong class="jxr_keyword">import</strong> com.google.gwt.user.client.rpc.SerializationException;
<a name="9" href="#9">9</a>   <strong class="jxr_keyword">import</strong> com.google.gwt.user.server.rpc.RPC;
<a name="10" href="#10">10</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.server.rpc.RPCRequest;
<a name="11" href="#11">11</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.server.rpc.RemoteServiceServlet;
<a name="12" href="#12">12</a>  <strong class="jxr_keyword">import</strong> com.google.gwt.user.server.rpc.SerializationPolicy;
<a name="13" href="#13">13</a>  
<a name="14" href="#14">14</a>  <strong class="jxr_keyword">import</strong> com.totsp.gwittir.client.stream.StreamServiceIterator;
<a name="15" href="#15">15</a>  
<a name="16" href="#16">16</a>  <strong class="jxr_keyword">import</strong> java.io.IOException;
<a name="17" href="#17">17</a>  <strong class="jxr_keyword">import</strong> java.io.PrintWriter;
<a name="18" href="#18">18</a>  
<a name="19" href="#19">19</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.InvocationTargetException;
<a name="20" href="#20">20</a>  <strong class="jxr_keyword">import</strong> java.lang.reflect.Method;
<a name="21" href="#21">21</a>  
<a name="22" href="#22">22</a>  <strong class="jxr_keyword">import</strong> java.net.URLEncoder;
<a name="23" href="#23">23</a>  
<a name="24" href="#24">24</a>  <strong class="jxr_keyword">import</strong> javax.servlet.ServletException;
<a name="25" href="#25">25</a>  <strong class="jxr_keyword">import</strong> javax.servlet.http.HttpServletRequest;
<a name="26" href="#26">26</a>  <strong class="jxr_keyword">import</strong> javax.servlet.http.HttpServletResponse;
<a name="27" href="#27">27</a>  
<a name="28" href="#28">28</a>  
<a name="29" href="#29">29</a>  <em class="jxr_javadoccomment">/**</em>
<a name="30" href="#30">30</a>  <em class="jxr_javadoccomment"> *</em>
<a name="31" href="#31">31</a>  <em class="jxr_javadoccomment"> * @author kebernet</em>
<a name="32" href="#32">32</a>  <em class="jxr_javadoccomment"> */</em>
<a name="33" href="#33">33</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../com/totsp/gwittir/service/StreamServiceServlet.html">StreamServiceServlet</a> <strong class="jxr_keyword">extends</strong> RemoteServiceServlet {
<a name="34" href="#34">34</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String SCRIPT_CLOSE = <span class="jxr_string">"&lt;/script&gt;"</span>;
<a name="35" href="#35">35</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String UTF8 = <span class="jxr_string">"UTF-8"</span>;
<a name="36" href="#36">36</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String WINDOW_PARENT = <span class="jxr_string">"window.parent."</span>;
<a name="37" href="#37">37</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String SCRIPT_OPEN = <span class="jxr_string">"&lt;script type=\&quot;text/javascript\&quot;&gt;"</span>;
<a name="38" href="#38">38</a>  
<a name="39" href="#39">39</a>      
<a name="40" href="#40">40</a>      
<a name="41" href="#41">41</a>      @Override
<a name="42" href="#42">42</a>      <strong class="jxr_keyword">public</strong> String readContent(HttpServletRequest request) {
<a name="43" href="#43">43</a>          <strong class="jxr_keyword">return</strong> request.getParameter(<span class="jxr_string">"r"</span>);
<a name="44" href="#44">44</a>      }
<a name="45" href="#45">45</a>  
<a name="46" href="#46">46</a>      @Override
<a name="47" href="#47">47</a>      <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> shouldCompressResponse(HttpServletRequest request,
<a name="48" href="#48">48</a>          HttpServletResponse response, String responsePayload) {
<a name="49" href="#49">49</a>          <strong class="jxr_keyword">return</strong> false;
<a name="50" href="#50">50</a>      }
<a name="51" href="#51">51</a>  
<a name="52" href="#52">52</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> sendResults(Method method, <a href="../../../../com/totsp/gwittir/client/stream/StreamServiceIterator.html">StreamServiceIterator</a> iterator,
<a name="53" href="#53">53</a>          SerializationPolicy policy) {
<a name="54" href="#54">54</a>          <strong class="jxr_keyword">try</strong> {
<a name="55" href="#55">55</a>              HttpServletResponse response = <strong class="jxr_keyword">this</strong>.getThreadLocalResponse();
<a name="56" href="#56">56</a>              HttpServletRequest request = <strong class="jxr_keyword">this</strong>.getThreadLocalRequest();
<a name="57" href="#57">57</a>              response.setContentType(<span class="jxr_string">"text/html"</span>);
<a name="58" href="#58">58</a>  
<a name="59" href="#59">59</a>              PrintWriter out = response.getWriter();
<a name="60" href="#60">60</a>              out.print(<span class="jxr_string">"&lt;html&gt;"</span>);
<a name="61" href="#61">61</a>  
<a name="62" href="#62">62</a>              <strong class="jxr_keyword">while</strong> (iterator.hasNext()) {
<a name="63" href="#63">63</a>                  <strong class="jxr_keyword">try</strong> {
<a name="64" href="#64">64</a>                      Object next = iterator.next();
<a name="65" href="#65">65</a>                      String obj = StreamServiceUtils.encodeResponse(next.getClass(),
<a name="66" href="#66">66</a>                              next, false, policy);
<a name="67" href="#67">67</a>  
<a name="68" href="#68">68</a>                      System.out.println(<span class="jxr_string">"Encoded response: "</span> + obj);
<a name="69" href="#69">69</a>                      out.println(SCRIPT_OPEN);
<a name="70" href="#70">70</a>                      out.print(WINDOW_PARENT);
<a name="71" href="#71">71</a>                      out.print(request.getParameter(<span class="jxr_string">"c"</span>));
<a name="72" href="#72">72</a>                      out.print(<span class="jxr_string">"(\&quot;"</span>);
<a name="73" href="#73">73</a>                      out.print(URLEncoder.encode(obj, UTF8)
<a name="74" href="#74">74</a>                                          .replaceAll(<span class="jxr_string">"&#92;&#92;+"</span>, <span class="jxr_string">"%20"</span>));
<a name="75" href="#75">75</a>                      out.println(<span class="jxr_string">"\&quot;);"</span>);
<a name="76" href="#76">76</a>                      out.println(SCRIPT_CLOSE);
<a name="77" href="#77">77</a>  
<a name="78" href="#78">78</a>                      <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.flushExtraAfterEachPush()) {
<a name="79" href="#79">79</a>                          out.print(<span class="jxr_string">"&lt;!--"</span>);
<a name="80" href="#80">80</a>  
<a name="81" href="#81">81</a>                          <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i &lt; 512; i++)
<a name="82" href="#82">82</a>                              out.print(<span class="jxr_string">" "</span>);
<a name="83" href="#83">83</a>  
<a name="84" href="#84">84</a>                          out.println(<span class="jxr_string">"--&gt;"</span>);
<a name="85" href="#85">85</a>                      }
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>                      out.flush();
<a name="88" href="#88">88</a>                  } <strong class="jxr_keyword">catch</strong> (SerializationException se) {
<a name="89" href="#89">89</a>                      out.println(SCRIPT_OPEN);
<a name="90" href="#90">90</a>                      out.print(WINDOW_PARENT);
<a name="91" href="#91">91</a>                      out.print(request.getParameter(<span class="jxr_string">"c"</span>));
<a name="92" href="#92">92</a>                      out.print(<span class="jxr_string">"E(\&quot;"</span>);
<a name="93" href="#93">93</a>                      out.print(URLEncoder.encode(se.toString(), UTF8)
<a name="94" href="#94">94</a>                                          .replaceAll(<span class="jxr_string">"&#92;&#92;+"</span>, <span class="jxr_string">"%20"</span>));
<a name="95" href="#95">95</a>                      out.println(<span class="jxr_string">"\&quot;);"</span>);
<a name="96" href="#96">96</a>                      out.println(SCRIPT_CLOSE);
<a name="97" href="#97">97</a>                      out.flush();
<a name="98" href="#98">98</a>                      <strong class="jxr_keyword">this</strong>.log(<span class="jxr_string">"Serialization exception"</span>, se);
<a name="99" href="#99">99</a>                  }
<a name="100" href="#100">100</a>             }
<a name="101" href="#101">101</a> 
<a name="102" href="#102">102</a>             out.print(SCRIPT_OPEN);
<a name="103" href="#103">103</a>             out.print(WINDOW_PARENT);
<a name="104" href="#104">104</a>             out.print(request.getParameter(<span class="jxr_string">"c"</span>));
<a name="105" href="#105">105</a>             out.println(<span class="jxr_string">"C();"</span>);
<a name="106" href="#106">106</a>             out.println(SCRIPT_CLOSE);
<a name="107" href="#107">107</a>         } <strong class="jxr_keyword">catch</strong> (IOException ioe) {
<a name="108" href="#108">108</a>             <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(ioe);
<a name="109" href="#109">109</a>         }
<a name="110" href="#110">110</a>     }
<a name="111" href="#111">111</a> 
<a name="112" href="#112">112</a>     <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">boolean</strong> flushExtraAfterEachPush() {
<a name="113" href="#113">113</a>         <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">true</strong>;
<a name="114" href="#114">114</a>     }
<a name="115" href="#115">115</a> 
<a name="116" href="#116">116</a>     @Override
<a name="117" href="#117">117</a>     <strong class="jxr_keyword">public</strong> String processCall(String payload) <strong class="jxr_keyword">throws</strong> SerializationException {
<a name="118" href="#118">118</a>         <strong class="jxr_keyword">try</strong> {
<a name="119" href="#119">119</a>             RPCRequest rpcRequest = StreamServiceUtils.decodeRequest(payload,
<a name="120" href="#120">120</a>                     <strong class="jxr_keyword">this</strong>.getClass(), <strong class="jxr_keyword">this</strong>);
<a name="121" href="#121">121</a>             <em class="jxr_comment">//onAfterRequestDeserialized(rpcRequest);</em>
<a name="122" href="#122">122</a> 
<a name="123" href="#123">123</a>             <a href="../../../../com/totsp/gwittir/client/stream/StreamServiceIterator.html">StreamServiceIterator</a> iterator = <strong class="jxr_keyword">null</strong>;
<a name="124" href="#124">124</a> 
<a name="125" href="#125">125</a>             <strong class="jxr_keyword">try</strong> {
<a name="126" href="#126">126</a>                 iterator = (StreamServiceIterator) rpcRequest.getMethod()
<a name="127" href="#127">127</a>                                                              .invoke(<strong class="jxr_keyword">this</strong>,
<a name="128" href="#128">128</a>                         rpcRequest.getParameters());
<a name="129" href="#129">129</a> 
<a name="130" href="#130">130</a>                 <strong class="jxr_keyword">try</strong> {
<a name="131" href="#131">131</a>                     <strong class="jxr_keyword">this</strong>.sendResults(rpcRequest.getMethod(), iterator,
<a name="132" href="#132">132</a>                         rpcRequest.getSerializationPolicy());
<a name="133" href="#133">133</a>                 } <strong class="jxr_keyword">catch</strong> (Exception e) {
<a name="134" href="#134">134</a>                     <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> RuntimeException(e);
<a name="135" href="#135">135</a>                 } <strong class="jxr_keyword">finally</strong> {
<a name="136" href="#136">136</a>                     <strong class="jxr_keyword">if</strong> (iterator != <strong class="jxr_keyword">null</strong>) {
<a name="137" href="#137">137</a>                         iterator.close();
<a name="138" href="#138">138</a>                     }
<a name="139" href="#139">139</a>                 }
<a name="140" href="#140">140</a>             } <strong class="jxr_keyword">catch</strong> (IllegalArgumentException ex) {
<a name="141" href="#141">141</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IncompatibleRemoteServiceException(<span class="jxr_string">""</span>, ex);
<a name="142" href="#142">142</a>             } <strong class="jxr_keyword">catch</strong> (InvocationTargetException ex) {
<a name="143" href="#143">143</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IncompatibleRemoteServiceException(<span class="jxr_string">""</span>, ex);
<a name="144" href="#144">144</a>             } <strong class="jxr_keyword">catch</strong> (IllegalAccessException ex) {
<a name="145" href="#145">145</a>                 <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IncompatibleRemoteServiceException(<span class="jxr_string">""</span>, ex);
<a name="146" href="#146">146</a>             }
<a name="147" href="#147">147</a> 
<a name="148" href="#148">148</a>             <strong class="jxr_keyword">return</strong> <span class="jxr_string">""</span>;
<a name="149" href="#149">149</a>         } <strong class="jxr_keyword">catch</strong> (IncompatibleRemoteServiceException ex) {
<a name="150" href="#150">150</a>             log(<span class="jxr_string">"An IncompatibleRemoteServiceException was thrown while processing this call."</span>,
<a name="151" href="#151">151</a>                 ex);
<a name="152" href="#152">152</a> 
<a name="153" href="#153">153</a>             <strong class="jxr_keyword">return</strong> RPC.encodeResponseForFailure(<strong class="jxr_keyword">null</strong>, ex);
<a name="154" href="#154">154</a>         }
<a name="155" href="#155">155</a>     }
<a name="156" href="#156">156</a> }
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